66734128 has 20 divisors (see below), whose sum is σ = 129766248. Its totient is φ = 33246080.

The previous prime is 66734047. The next prime is 66734131. The reversal of 66734128 is 82143766.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2926 + ... + 11917.

Almost surely, 2^66734128 is an apocalyptic number.

It is an amenable number.

66734128 is a deficient number, since it is larger than the sum of its proper divisors (63032120).

66734128 is a wasteful number, since it uses less digits than its factorization.

66734128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15132 (or 15126 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 66734128 is about 8169.0959108092. The cubic root of 66734128 is about 405.6168580824.

It can be divided in two parts, 6673 and 4128, that added together give a palindrome (10801).

The spelling of 66734128 in words is "sixty-six million, seven hundred thirty-four thousand, one hundred twenty-eight".